A couple times a day it seems I have drivers honking their horns at my house for no apparent reason. I want to have some fun with them instead of calling the police. Is it possible to have some kind of software listen to the footage and send an output (like through a USB relay device), that could turn on/off a train horn? I would also like it to run automatically by using their license plates, so the software would need LPR functionality as well. This stuff all sounds like something that costs a fortune, but just curious if it's something that has been done before because I can see a lot of uses for this. For example, gun shot detection.